html,
body {
    width: 100%;
    height: 100%;
    /* 防止盒子塌陷 */
    overflow: hidden;

}

body {
    background-image: url(../images/Snipaste_2021-03-12_18-17-44.png);
    background-size: 1920px, 1080px;
}

#logo {
    margin: 20px 0 0 240px;
}

.box {
    width: 400px;
    height: 310px;
    background-color: transparent;
    position: absolute;
    left: 50%;
    top: 50%;
    border: 1px solid #ccc;
    transform: translate(-50%, -50%);
    border-radius: 25px;
}

.title {
    font-size: 26px;
    line-height: 60px;
    text-align: center;
    color: #8df;
}

.layui-form {
    margin: 0 30px;
}

.register {
    display: none;
}

.layui-input-block {
    margin-left: 0px;
}

.layui-input {
    border-radius: 15px;
    border: 1px solid #ccc;
    background-color: transparent;
    color: #8df;
}

.fbtn {
    border-radius: 15px;
}

.changebox {
    float: right;
    color: orange;
}

::-webkit-input-placeholder {
    color: #8df;
    opacity: 0.7;
}